03.021 I have an 8kB TransWarpGS. How does a cache upgrade compare with a speed upgrade?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
03.021 I have an 8kB TransWarpGS. How does a cache upgrade compare with a speed upgrade?
John Link charted some comparisons in 1991 involving nine setups: no-TWGS,
and 7, 8, 9, 10mHz boards before and after the 8kB-to-32kB cache upgrade. He
used three benchmarks:
1. time to calculate page breaks in a 218-page Appleworks document
2. time to scroll through a 39-page Awks-GS document
3. time to compile 4800 lines of MD-BASIC source code
For a 7mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33%
to nearly x2.5 plain GS speed.
For a 10mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33%
to about x3.25 plain GS speed.
His charts shows that a 7mHz TWGS with the 32kB cache performs slightly
better than a 10mHz TWGS with 8kB cache on tests 1 and 3; it is a bit slower on
test 2.
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